Quantum Positioning System

Seth Lloyd and
other MIT researchers have announced a
paper detailing what they call a Quantum Positioning System (QPS). They plan
to exploit quantum weirdness to increase the accuracy of traditional
pulse-timing methods used by most current positioning systems such as
GPS, sonar, lidar, and radar. They claim their scheme could increase the
precision of such systems by a factor of 1000 or more. (a related
scheme using quantum entanglement to syncronize clocks was proposed
last year by Isaac Chuang of IBM.)